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Technical discussion about Matlab and issues related to Digital Signal Processing.

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voice recognition system - jergang19 - Nov 3 5:09:00 2003

Hi everyone, I am working on a voice recognition project. A speaker speakes a few pre-defined words into the system, and the system matches the audio waveform with stored templates. If there is a match, Matlab returns a value to the user. If there is no match, user access shall be denied. Has anyone done this program before? I am very new in Matlab and I would very much appreciate it if anyone could mail me their code so that I can learn from it. thanks jergang19

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Re: voice recognition system - Ahmad hasan - Nov 10 10:25:00 2003

Heloo Mr. Jergang19 In the Area you chosen, you have to decide taht, - Your system will be speaker dependent, or independent. - Your system is for 'Isolated words', 'Connected words',or 'Continous speach'. Note: the simplest one is Isolated words, speaker dependent. The matching should be not between the stored waveform, incoming one. Follow the steps. 1- record the voice from MIC. directly with matlab function called 'waverecord.m' 2-deal with the waveforms' .wav' files using ' waveread', and wavewrite' functions. 3- process the waveform to eleminate the silence from the, and to extract certain features that are private for any speaker. 4- compare the feauter vectors that are stored with taht coming from speaker using certain recognition technique. -To extract features from waverforms use 'Zerocrossing Technique', or 'Energy function'. -The best recognition techniques are ' MED minimum Eucleadian Distance', ' KNN K Nearest Nieghbor', or ' ANN Artificial Neural Networks'. Study all topics you dont know listed above, and start programming. best of wishes Ahmad hasan